Details

Autor(en) / Beteiligte

• James Martin, David
• Decarolis, Donato
• Odarchenko, Yaroslav I
• Herbert, Jennifer J
• Arnold, Thomas
• Rawle, Jonathan
• Nicklin, Chris
• Boyen, Hans-Gerd
• Beale, Andrew M

Titel

Reversible restructuring of supported Au nanoparticles during butadiene hydrogenation revealed by operando GISAXS/GIWAXS

Ist Teil von

• Chemical communications (Cambridge, England), 2017-05, Vol.53 (37), p.5159-5162

Ort / Verlag

England

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Periodically arranged, monodisperse gold nanoparticles supported on flat silicon substrates were studied for the hydrogenation of 1,3-butadiene under operando conditions using Grazing Incidence Small- and Wide-Angle X-ray Scattering (GISAXS/GIWAXS). It was found that the composition and shape of the nanoparticles depends very much on the chemical environment; the particles are shown to be dynamic, undergoing reversible size and shape change particularly during catalytic reaction, highlighting a dynamism often not observed in traditional studies. Specifically, the size of the Au nanoparticles increases during butadiene hydrogenation and this is attributed to the partial removal of a Au O at the metal-oxide interface and consequential shape change of the nanoparticle from a more hemispherical particle to a particle with a larger height to width ratio.